Laryngeal trauma is a rare but potentially fatal injury, accounting for approximately 1% of all trauma presentations. The majority (91%) are blunt/closed injuries, with an overall mortality of ~3.8%. [1] A high index of suspicion is essential, as clinical presentation may be subtle and the severity of injury can be underestimated. [2] Early diagnosis and intervention are critical for preserving airway, voice, and swallowing function. [3-4]
1. History
- Mechanism: Blunt (MVC — steering wheel/dashboard/seatbelt, clothesline injury, sports, assault, strangulation) vs. penetrating (GSW, stab wound) [4-6]
- Symptom characterization: Dysphonia/hoarseness, dyspnea, odynophagia, dysphagia, neck pain, hemoptysis, cough [7-8]
- Timing: Immediate voice change vs. progressive symptoms — immediate dysphonia suggests structural injury; delayed worsening suggests expanding hematoma or edema [9]
- Severity/progression: Ask about worsening stridor, increasing dyspnea, or difficulty swallowing secretions
- Associated symptoms: Neck swelling, sensation of "something broken," difficulty breathing when supine
- Important negatives: Absence of voice change, no difficulty breathing, no neck swelling — but do not be falsely reassured; severity may "lie beneath" a benign exam [2]
- Anticoagulant use: Increases risk of progressive laryngeal hematoma even from minor/indirect trauma [9]
2. Alarm Features
- Stridor (inspiratory or biphasic) — indicates significant airway compromise
- Progressive dysphonia or aphonia
- Subcutaneous emphysema — suggests mucosal disruption or cartilage fracture with airway communication
- Sucking or bubbling neck wound (penetrating trauma) [1]
- Expanding neck hematoma — risk of vascular injury and airway compression
- Hemoptysis or pharyngeal bleeding
- Loss of normal laryngeal landmarks on palpation (flattened thyroid cartilage prominence) [7]
- Complete airway obstruction — laryngotracheal separation is the most catastrophic injury
- Anticoagulated patients: Even isolated arytenoid hematoma can progress to life-threatening obstruction [9]
3. Medications
- Anticoagulants/antiplatelets: Significantly increase risk of progressive laryngeal hematoma; consider reversal if life-threatening hemorrhage or expanding hematoma [9]
- Corticosteroids: Dexamethasone or methylprednisolone may be used to reduce laryngeal edema (extrapolated from airway edema management); no high-level evidence specific to laryngeal trauma
- Proton pump inhibitors: Consider for mucosal healing and to reduce acid reflux irritation to injured larynx
- Antibiotics: Indicated for open/penetrating injuries or when mucosal disruption is present
- Avoid sedatives that may compromise respiratory drive in patients with tenuous airways
- Avoid blind nasotracheal intubation — risk of creating false passage through disrupted larynx [10]
4. Diet
- NPO initially if surgical intervention is anticipated or airway is unstable
- Soft diet or liquids once cleared — dysphagia is common and aspiration risk must be assessed
- Avoid hot liquids and irritants that may worsen mucosal edema
- Advance diet as tolerated based on swallowing evaluation
- Long-term: Speech-language pathology swallowing assessment before diet advancement in severe injuries
5. Review of Systems
- Respiratory: Dyspnea, stridor, positional breathing difficulty, cough
- ENT: Voice change, odynophagia, dysphagia, hemoptysis, otalgia (referred pain)
- Neurologic: Altered mental status (concomitant head injury), cervical spine symptoms
- Vascular: Pulsatile neck mass, neurologic deficits suggesting carotid/vertebral injury
- GI: Dysphagia, drooling, inability to swallow secretions (suggests pharyngeal/esophageal injury)
- Musculoskeletal: Cervical spine pain, facial fractures (96% of laryngeal fractures have concomitant maxillofacial injuries in some series) [11]
6. Collateral History and Family History
- Collateral: Witnesses to mechanism (force, direction of impact), voice quality at baseline vs. post-injury, loss of consciousness, strangulation duration if applicable [9]
- Strangulation cases: Duration of compression, loss of consciousness, petechiae, incontinence — document carefully for medicolegal purposes
- Family history: Generally not contributory, though connective tissue disorders (e.g., Ehlers-Danlos) may predispose to cartilage/soft tissue injury
- Social context: Intimate partner violence screening is critical when strangulation is suspected
7. Risk Factors
- Motor vehicle accidents (most common cause — steering wheel, seatbelt, dashboard) [8]
- Sports injuries (contact sports, ball/stick/elbow to anterior neck) — often young males [12]
- Assault/strangulation — increasing proportion of intentional injuries [13]
- Older age with ossified cartilage — more prone to fracture (younger patients have more elastic cartilage)
- Anticoagulation therapy — risk of progressive hematoma from even minor trauma [9]
- Penetrating trauma (GSW, stab wounds) — 81% GSW in one series [6]
- Clothesline-type injuries (ATV, snowmobile, motorcycle)
8. Differential Diagnosis
- Cervical spine injury — always assume until cleared; concomitant in many blunt trauma cases
- Vascular injury (carotid/jugular) — expanding hematoma, neurologic deficits; requires CTA
- Pharyngeal/esophageal perforation — subcutaneous emphysema, dysphagia; evaluate with esophagoscopy [4]
- Hyoid bone fracture (isolated) — pain with swallowing, tenderness at hyoid; may occur without laryngeal fracture
- Retropharyngeal hematoma — can cause airway compromise; visible on lateral neck imaging/CT
- Tracheal injury — may coexist; subcutaneous emphysema, pneumomediastinum
- Angioedema — if no clear trauma history; consider allergic/ACE-inhibitor etiology
- Foreign body aspiration — sudden onset stridor without trauma history
- Epiglottitis — fever, drooling, toxic appearance; no trauma history
9. Past Medical History
- Prior laryngeal surgery or intubation (pre-existing stenosis or scarring)
- Previous neck trauma or radiation
- Connective tissue disorders
- Anticoagulant/antiplatelet use
- Chronic lung disease (reduced respiratory reserve)
- Prior tracheostomy
- Cervical spine disease (impacts airway management decisions)
10. Physical Exam
- Vital signs: Tachypnea, stridor, desaturation, tachycardia (signs of airway compromise or hemorrhage)
- Inspection: Neck swelling, ecchymosis, lacerations, deformity, subcutaneous emphysema (crepitus), loss of thyroid cartilage prominence [7]
- Palpation: Tenderness over laryngeal framework, crepitus (fracture or subcutaneous air), loss of normal landmarks, step-off deformity
- Auscultation: Stridor (inspiratory = supraglottic; biphasic = glottic/subglottic), air leak from wound
- Voice assessment: Hoarseness, breathy voice, aphonia — correlates with vocal fold injury or recurrent laryngeal nerve damage
- Flexible fiberoptic laryngoscopy (bedside): The single most important exam — evaluates vocal fold mobility, mucosal integrity, hematoma, edema, arytenoid dislocation, airway patency [3][14]
- Penetrating wounds: Do NOT probe — assess for bubbling, active hemorrhage, platysma violation
11. Lab Studies
- ABG/VBG: Assess ventilation and oxygenation in patients with respiratory distress
- CBC: Baseline hemoglobin if hemorrhage suspected
- Type and screen/crossmatch: If significant hemorrhage or surgical intervention anticipated
- Coagulation studies (PT/INR, PTT): Especially in anticoagulated patients [9]
- Lactate: If concern for shock or significant hemorrhage
- Labs are generally adjunctive — diagnosis is clinical and imaging-based
12. Imaging
- CT neck with IV contrast (first-line): 100% sensitivity for laryngotracheal injury in one series; evaluates cartilage fractures, soft tissue edema/hematoma, airway narrowing, subcutaneous emphysema [14-16]
- Axial images may miss 12% of fractures; 2D multiplanar and 3D reconstructions improve detection of thyroid fractures, arytenoid luxation, and hyoid fractures [17]
- Thyroid cartilage fractures are most common (82%), followed by cricoid (24%) [18]
- CTA neck: When vascular injury is suspected (penetrating trauma, expanding hematoma, zone II/III injuries)
- Chest X-ray: Evaluate for pneumomediastinum, pneumothorax, subcutaneous emphysema
- Lateral soft tissue neck X-ray: May show prevertebral soft tissue swelling, subcutaneous air — largely supplanted by CT
- MRI: Not indicated acutely; may be useful for soft tissue evaluation in subacute/chronic phase [16]
- Imaging is unnecessary for: Trivial mechanism with completely normal exam, normal voice, and no tenderness — though a low threshold for CT is recommended given the risk of occult injury [2]
13. Special Tests
- Flexible fiberoptic laryngoscopy (FFL): Bedside, first-line endoscopic evaluation — assesses vocal fold mobility, mucosal injury, hematoma, arytenoid position, airway patency. Identified injury in 75% of cases in one series [3][14][19]
- Direct laryngoscopy and rigid esophagoscopy: Performed in the OR prior to surgical repair — evaluates hard and soft tissues of the larynx, pharynx, and esophagus [4]
- Schaefer-Fuhrman Classification (severity grading): [3][6][13]
- Laryngeal EMG: May be useful in select patients to evaluate recurrent laryngeal nerve function [4]
- Stroboscopy: Subacute evaluation of vocal fold vibratory function [4]
- Ultrasonography: Non-invasive complementary tool, especially in pediatric patients [20]
14. ECG
- Not specific to laryngeal trauma, but obtain in all trauma patients per ATLS protocol
- Evaluate for arrhythmias secondary to hypoxia from airway compromise
- Consider cardiac contusion if blunt chest trauma is concomitant (steering wheel mechanism)
- Strangulation: May cause carotid body stimulation → bradycardia or cardiac arrest
15. Assessment
Laryngeal trauma ranges from minor mucosal contusion to complete laryngotracheal separation. Clinical presentation may be deceptively benign — up to 46% of patients with laryngeal fractures have compromised airways. [13] Key assessment principles:
- Severity does not always correlate with external appearance; subcutaneous emphysema and loss of landmarks are ominous signs [7]
- Cricoid fractures are particularly dangerous — always associated with soft tissue abnormalities and higher rates of airway narrowing [13][18]
- Penetrating injuries have higher rates of severe (Schaefer ≥3) injury [6]
- Complications: subglottic/glottic stenosis, vocal fold paralysis, chronic dysphonia, aspiration, need for permanent tracheostomy
- Overall mortality is low (~1.4–3.8%) with appropriate management [1][13]
16. Treatment Plan
Initial stabilization (ABCs)
- Airway is the priority — maintain a low threshold for definitive airway management [3-4]
- Awake tracheostomy is preferred over oral intubation for severe injuries (Schaefer ≥III) — intubation risks creating false passage or worsening injury [3][10]
- Cricothyrotomy is a last resort if tracheostomy is not feasible and intubation fails [4]
- If intubation is attempted, use fiberoptic-guided technique with the smallest appropriate ETT; maintain spontaneous ventilation [10]
- Avoid paralysis (RSI) if possible in unstable airways — loss of muscle tone may cause complete obstruction [10]
Medical management (Schaefer I–II)
- Head of bed elevation (30–45°)
- Humidified oxygen
- Voice rest
- Corticosteroids (dexamethasone) for edema reduction
- PPI for reflux prophylaxis
- Antibiotics if mucosal disruption present
- Close airway monitoring for minimum 24 hours [13]
Surgical management (Schaefer III–V)
- Operative within 24–48 hours for optimal outcomes [3-4]
- Begin with direct laryngoscopy and rigid esophagoscopy in the OR [4]
- Open reduction and internal fixation (ORIF) of displaced fractures with titanium miniplates [11][21]
- Primary closure of mucosal lacerations via thyrotomy [4]
- Endolaryngeal stenting reserved for massive mucosal trauma, comminuted fractures, or anterior commissure disruption [4]
- Recent evidence suggests some penetrating injuries (Schaefer ≥III) may have good outcomes without ORIF [6]
17. Disposition
- Admit all patients with confirmed or suspected laryngeal injury — minimum 24-hour observation is recommended to detect delayed complications [2][13]
- ICU admission: Stridor, respiratory distress, unstable airway, tracheostomy, expanding hematoma, anticoagulated patients with laryngeal hematoma [9]
- OR: Schaefer III–V injuries, penetrating injuries requiring exploration, expanding hematoma with vascular injury
- Observation unit: Isolated minor soft tissue injury (Schaefer I) with stable airway, normal FFL, and reliable follow-up — may be considered but inpatient observation is safer
- Transfer: To a Level I trauma center or facility with otolaryngology/head-and-neck surgery if not available on-site [1]
- Specialist consultation: ENT/otolaryngology should be consulted emergently for all suspected laryngeal injuries [3][22]
18. Follow Up / Return Precautions
- Follow-up: ENT within 1 week for repeat flexible laryngoscopy and voice assessment; earlier if symptoms worsen
- Return immediately for: Worsening difficulty breathing, new or worsening stridor, inability to swallow, worsening voice change, increasing neck swelling, fever
- Patient counseling:
- Strict voice rest for 5–7 days minimum
- Avoid straining, heavy lifting, or Valsalva maneuvers
- Sleep with head elevated
- Soft diet as tolerated
- Expected recovery: Minor injuries (Schaefer I–II) typically recover fully; voice outcomes are good in 83% of surgically managed patients; all patients requiring tracheostomy in most series are eventually decannulated [5][11-12][21]
- Long-term monitoring: Watch for subglottic stenosis, granulation tissue, vocal fold scarring — may present weeks to months later [23]
- Speech-language pathology referral for persistent dysphonia or swallowing difficulty
Images
References
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